<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model="name" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model="age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="sex">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="btn()">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, index) in arr" :key="index">
          <td>{{ index + 1 }}</td>
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.sex }}</td>
          <td>
            <button @click="btn1(index)">删除</button>
            <button @click="btn2(item, index)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      arr: [
        { name: "Tom", age: 19, sex: "男" },
        { name: "jone", age: 21, sex: "女" },
      ],
      name: "",
      age: 0,
      sex: "男",
      ind: -1,
    };
  },
  methods: {
    btn() {
      let obj = {
        name: this.name,
        age: this.age,
        sex: this.sex,
      };
      if (this.ind == -1) {
        this.arr.push(obj);
      } else {
        this.$set(this.arr, this.ind, obj);
      }
    },
    btn1(index) {
      this.arr.splice(index, 1);
    },
    btn2(item, index) {
      this.name = item.name;
      this.age = item.age;
      this.sex = item.sex;
      this.ind = index;
    },
  },
};
</script>
